The role of speedball:
1. Effectively relax your shoulders, cervical spine and body.
2. Strengthen cardio and cardio function, release fatigue, relax your mind and body.
3. Increase hand-eye coordination and symmetry of the body, which is very useful for people of all ages, especially for childrens brain and body development.
4. Fast movement, good coordination and rhythm.
5. Freely control the intensity of your exercise and reach the best ground for fitness leisure.